The author, Paul, pivots in chapter 4. In the first three chapters, he laid out the many blessings of being adopted into God's Dream Home, and now the focus is on us. What are the expectations of children of God? How should we behave? Paul uses the word "walk" to describe a lifestyle change that is appropriate for God's own children; a life of humility, gentleness and patience. Just put one foot in front of the other!